You have a vault in your home that contains all your most vital belongings, but did you know that your home state has one, too? To make it even more South Dakota, this vault is hidden in our most iconic landmark and is so secret that most people do not even know it exists:
Hiding out inside Mount Rushmore is the super secret and super fascinating Hall of Records.
Located behind Abraham Lincoln's head, the Hall of Records contains a few of the country's most valuable artifacts, including the Constitution, Declaration of Independence, and the Bill of Rights.
Engineered and dreamed up by Mount Rushmore sculpture Gutzon Borglum, the Hall of Records was intended to be an 800-foot stairway that led to a grand hall measuring 80 feet by 100 feet.
Sadly, because of Borglum's untimely death, these original plans never came to fruition, though the Hall was finally finished (albeit smaller) in 1998.
While the Hall of Records is not nearly as intricate as Borglum envisioned (the illustrations and hand-carved descriptions of various American landmarks never came to be), it is still a vital part of American history.